No, you should name it "Your Pictures" because the app is communicating to the user that in this tab there are "your pictures". The article gives an example for the case:

> Similarly, a support agent might tell you to “Go to your cases” over webchat or a phone call. This is confusing if the UI says “My cases”.

Replace "cases" with "pictures" :)

If, however, there's a button which lets you upload pictures, it should be "Upload my picture", because the user is the one who's communicating to the app about their intent.